feat: Add emails feature description

packages/internal/docs/docs/v2/introduction/features/emails.mdx

@@ -3,4 +3,36 @@ title: Emails
 description: Transactional emails with React templates
 ---
 
-TBD
+SaaS Boilerplate offers an email system functionality out of the box, providing developers with a powerful tool to
+engage users through email. This functionality covers everything from creating and sending email templates to scheduling
+emails and sending test emails for debugging purposes.
+
+### Lively email templates in React using Storybooks
+
+The email system functionality allows developers to build lively templates in React using Storybooks, allowing them to
+get creative with their email designs. Storybooks provide a live development environment for building UI components,
+making it easier to develop and test email templates before they are sent.
+
+### Standard email templates
+
+The functionality includes a set of ready-to-send transactional emails, such as *new user verification*, *password
+recovery*, *subscription renewals* making it easy for developers to get started.
+
+### Creating new email templates
+
+Creating new email templates is a breeze using the email template generator and developer-friendly API.
+
+### Scheduling emails
+
+The email system functionality also includes the ability to schedule emails at a given time, allowing developers to send
+emails at the most optimal time for their users.
+
+### Sending test emails
+
+Sending test emails is made easy with the ability to send test emails directly from a Storybook to Mailcatcher service.
+This allows developers to debug and test their email templates before they are sent to users.
+
+### Internationalization Support
+
+The email system functionality also includes internationalization support, allowing developers to create email templates
+in multiple languages to better engage with their global users.